Challenge - #40 - No Idea!

 n,m = map(int, input().split())

array = list(map(int, input().split()))
set_a = set(map(int, input().split()))
set_b = set(map(int, input().split()))

happiness = 0 

for i in array :
    if i in set_a :
        happiness += 1
    elif i in set_b :
        happiness -= 1
    else :
        pass
print(happiness)

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